Iran’s Ministry of Foreign Affairs summoned a British diplomat in Tehran following the arrest of several Iranian nationals in the United Kingdom on espionage charges, state media reported on Monday.

"Following the unjustified arrest of a number of Iranian nationals in the UK... the British charge d'affaires in Tehran was summoned on Sunday," Iran's IRNA news agency said.

Right after the arrest in early May, Foreign Minister Abbas Araqchi firmly denied any Iranian involvement in the alleged plot targeting the Israeli embassy in London, describing media reports as suspicious. He urged the British government to cooperate in a transparent investigation and warned of the possibility of third-party false-flag operations aimed at damaging Iran–UK relations.

Earlier this month, British police arrested seven Iranian nationals in two separate operations, which the interior minister described as among the most significant investigations of their kind in recent years.

The three men have been charged with engaging in conduct likely to assist a foreign intelligence service between August 14, 2024, and February 16, 2025, police said, adding that the foreign state to which the charges relate is Iran.

The charges come at a time of intense scrutiny of suspected Iran-backed activities in Britain.
Interior minister Yvette Cooper said Britain would take "separate action" to address the serious issues raised by the case of the three men.

"Iran must be held to account for its actions," she said in a statement. "We must also strengthen our powers to protect our national security as we will not tolerate growing state threats on our soil."

Police said in a separate statement later on Saturday that four other men arrested as part of the counter-terrorism operation had been released from custody but the investigation was still open.

"We made these arrests due to concerns about a suspected plot to target a specific premises," the statement said, adding that they continued to provide the premises with support.

"Our investigation remains active and is ongoing."

The eighth man was released without charge on Thursday.

Britain's domestic spy chief Ken McCallum said last year that officers had responded since 2022 to 20 Tehran-backed plots that potentially posed lethal threats to UK citizens and residents.

The three men charged - Mostafa Sepahvand, 39, Farhad Javadi Manesh, 44, and Shapoor Qalehali Khani Noori, 55 - were remanded in custody and will appear at a preliminary hearing at the central criminal court on June 6.

The court on Saturday heard allegations that the three men had targeted Britain-based journalists connected with Iran International, a broadcaster which is critical of the Iranian government.

Sepahvand was also charged with surveillance and intending to commit serious violence against a person in Britain, while Manesh and Noori were charged with surveillance and the intention that serious violent acts would be committed by others.

The men arrived by irregular means, the government said, including via small boats across the Channel between 2016 and 2022.

The British government has placed Iran on the highest tier of its foreign influence register, requiring Tehran to register everything it does to exert political influence in the UK.

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